As you asking for TOEFL and SAT exam so on your demand here I am telling for both exam :

TOEFL (Test of English as a Foreign Language) is a standardized test to measure the English language ability of non-native speakers wishing to enroll in English-speaking universities, TOEFL is a trademark of the Educational Testing Service (ETS), a private non-profit organization, which designs and administers the tests.

Type Internet-based or paper-based standardized test.

Developer / administrator Educational Testing Service

Knowledge / skills tested Reading, listening, speaking and writing of the
English language.

Purpose Testing the English language proficiency of non-native English
speakers for academic and other purposes.

Year started 1964

Duration Internet-based test (iBT): 3 hours 10 minutes to 4 hours 20 minutes
(excluding 10-minute break in-between).

Paper-based test (PBT): 2 hours 20 minutes to 2 hours 30 minutes.

Score / grade range iBT:

0 to 30 (in 1 point increments) on each of the 4 sections. So total of 0 to 120.

PBT:

Listening: 31 to 68, Structure: 31 to 69, Reading: 31 to 67. Total of 310 to 677.
Writing (separate): 0 to 6. (All in 1 point increments.)
Score / grade validity 2 years

Offered iBT: More than 50 times a year.

Restrictions on attempts iBT: Can be taken only once in any 12-day period.

Countries / regions 4500 test centers in 165 countries.

Languages English

Prerequisites / eligibility criteria No official prerequisite. Intended for non-native English speakers.

Fee iBT: US$ 160 to US$ 250, depending on the country.

PBT: US$ 160.

Scores / grades used by Over 9000 universities, agencies and other
institutions in over 130 countries.


SAT is a standardized test widely used for college admissions in the United States, It is developed and administered on behalf of the College Board by the Educational Testing Service:

Type Paper-based standardized test

Developer / administrator College Board, Educational Testing Service.

Knowledge / skills tested Writing, critical reading, mathematics.

Purpose Admission to undergraduate programs of universities or colleges.

Year started 1926

Duration 3 to 4 hours

Score / grade range 200–800 (in 10-point increments) on each of two sections
(total 400–1600).

Essay scored on scale of 0–24, in 1-point increments.

Offered Seven times annually

Countries / regions Worldwide

Languages English

Annual no. of test takers Over 1.69 million high school graduates in the class of
2015

Prerequisites / eligibility criteria No official prerequisite. Intended for high
school students. Fluency in English assumed.

Fee US$52.5 to US$101.5, depending on country.


Scores / grades used by Most universities and colleges offering undergraduate
programs in the U.S.